A light, narrow-gauge railway of 58 km (36 mi) on St. Kitts is operated by the government to transport sugarcane from fields to factory and processed sugar to the pier at Rawlins Bay. In 2002, there were 320 km (199 mi) of roads on the islands, of which 136 km (85 mi) were paved; the main roads circle each island. Basseterre and Charlestown are the principal ports. A state-run motorboat service is maintained between St. Kitts and Nevis. In 2001 there were two airports, both with paved runways. Golden Rock International Airport is a modern facility serving Basseterre; several small airlines fly to a landing strip at Newcastle, on Nevis.